i would love to see this with the presidents of the united states. and see them age. just over four years, maybe eight years. >> look like different men when their term is over. that's for sure. ever see how gray president obama has gotten? difference between '08 and now. staggering. will look like george washington if he gets back in office. >>> coming up next, the medical study that could be a game-changer for pro football. >>> and grade school glamour shots. you heard us right. parents posing their kids in elaborate back-to-school photos. what's be hind the trend? you are watching "world news now." ♪ don't take my kodachrome away ♪ ♪ if you took all the girls >> announcer: "world news now" weather, brought to you by united health care. ews now" weather, brought to you by united health care. ing, but it doesn't cover everything. only about 80% of your part b medical expenses. the rest is up to you. so consider an aarp medicare supplement insurance plan, insured by unitedhealthcare insurance company. like all standardized medicare supplement plans, they pick up